1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bce5cb7bb48bd7886dbd373b7637b2f9b923bc0fa8ff7fd7e1939481daa1de. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c5a9fb4-f211-4d12-9bca-cc1482c765c0.json and https://artists.proofprofile.net/proofs/artist/5c5a9fb4-f211-4d12-9bca-cc1482c765c0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bach, J.S.: Flute Sonata in E Major, Bwv 1035 / Debussy, C.: Rapsodie / Villa-Lobos, H.: Fantasia (Arr. for Saxophone and Piano)
Ibert / Glazunov / Villa-Lobos / Dubois: Saxophone Concertos
Concerto in E flat op.109 for Alto Saxophone a. String Orchestra
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac77f07a960be08bd55a11e563e7175e11456ef495a8015963106effaf531c1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057102770.
Fantasia for Soprano Saxophone, 3 Horns and String Orchestra: 2. Lent
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed99b91d1e4a120d647ea2e5b4c0ac6d72b420b34d5199c2aa2d809c389ed8db. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057102752.
Fantasia for Soprano Saxophone, 3 Horns and String Orchestra: 3. Très animé
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ffe9e48fc86ea346c21c0185ef2ff86eabee191705bd110d1b9f2844a9de13. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057102753.
Concerto for Alto Saxophone and String Orchestra: 1. Lento espressivo - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad82d98b8c489b8df2432ed4ff198930ef222bedd14a19d646f504395b691dc. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057102741.
Concerto for Alto Saxophone and String Orchestra: 3. Rondo - Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a405494532bb458bd1c5f02814bba309b0c7550dfa6c993de2a81f98322aee2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057102743.
Concertino da camera for Alto Saxophone and 11 Instruments: 1. Allegro con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391fc9a4ccb96f06b017dbbb0893901da47bc993457fa4b9d9e2306c7fea43d1. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057102761.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Concertino da camera for Alto Saxophone and 11 Instruments: 2. Larghetto - Animato molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0135db36010b94259e6e0546912d744b904993e0e3827366514593d8c037778e. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057102762.
Fantasia for Soprano Saxophone, 3 Horns and String Orchestra: 1. Animé
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2f8cc83618870ff6d9e47e3dee26626c4160f07b02892807a755ff57b74ea3. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057102751.
Concerto for Alto Saxophone and String Orchestra: 2. Sarabande - Lento nostalgico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffb045167ce51780cad6f1862bba4e835cd8945bd6c6bff170059aad45db62e. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057102742.